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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #4 Mar 31 2012 12:35:14
%S 1,1,1,1,1,1,1,1,1,1,33,13,357,57,3654,277,39873,2427,687008,27961,
%T 15511627,440433,608333563,11044775,33683651469,365499077
%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01000-11111-01000 pattern in any orientation.
%e Maximal 11 X 11 example
%e .0.0.0.1.0.0.0.1.0.0.0
%e .1.1.1.1.1.0.1.1.1.1.1
%e .0.0.0.1.0.0.0.1.0.0.0
%e .0.0.0.0.0.0.0.0.0.0.0
%e .0.0.0.1.0.0.0.1.0.0.0
%e .1.1.1.1.1.0.1.1.1.1.1
%e .0.0.0.1.0.0.0.1.0.0.0
%e .0.0.0.0.0.0.0.0.0.0.0
%e .0.0.0.1.0.0.0.1.0.0.0
%e .1.1.1.1.1.0.1.1.1.1.1
%e .0.0.0.1.0.0.0.1.0.0.0
%K nonn
%O 1,11
%A _R. H. Hardin_, Nov 04 2008